sys/netinet/in_pcb.c

   1 /*
   2  * cOPyright (c) 2004 Jeffrey M. Hsu.  All rights reserved.
   3  * Copyright (c) 2004 The DragonFly Project.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to The DragonFly Project
   6  * by Jeffrey M. Hsu.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of The DragonFly Project nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific, prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  28  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Copyright (c) 2004 Jeffrey M. Hsu.  All rights reserved.
  36  *
  37  * License terms: all terms for the DragonFly license above plus the following:
  38  *
  39  * 4. All advertising materials mentioning features or use of this software
  40  *    must display the following acknowledgement:
  41  *
  42  *      This product includes software developed by Jeffrey M. Hsu
  43  *      for the DragonFly Project.
  44  *
  45  *    This requirement may be waived with permission from Jeffrey Hsu.
  46  *    This requirement will sunset and may be removed on July 8 2005,
  47  *    after which the standard DragonFly license (as shown above) will
  48  *    apply.
  49  */
  50
  51 /*
  52  * Copyright (c) 1982, 1986, 1991, 1993, 1995
  53  *      The Regents of the University of California.  All rights reserved.
  54  *
  55  * Redistribution and use in source and binary forms, with or without
  56  * modification, are permitted provided that the following conditions
  57  * are met:
  58  * 1. Redistributions of source code must retain the above copyright
  59  *    notice, this list of conditions and the following disclaimer.
  60  * 2. Redistributions in binary form must reproduce the above copyright
  61  *    notice, this list of conditions and the following disclaimer in the
  62  *    documentation and/or other materials provided with the distribution.
  63  * 3. All advertising materials mentioning features or use of this software
  64  *    must display the following acknowledgement:
  65  *      This product includes software developed by the University of
  66  *      California, Berkeley and its contributors.
  67  * 4. Neither the name of the University nor the names of its contributors
  68  *    may be used to endorse or promote products derived from this software
  69  *    without specific prior written permission.
  70  *
  71  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  72  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  73  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  74  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  75  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  76  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  77  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  78  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  79  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  80  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  81  * SUCH DAMAGE.
  82  *
  83  *      @(#)in_pcb.c    8.4 (Berkeley) 5/24/95
  84  * $FreeBSD: src/sys/netinet/in_pcb.c,v 1.59.2.27 2004/01/02 04:06:42 ambrisko Exp $
  85  * $DragonFly: src/sys/netinet/in_pcb.c,v 1.41 2006/12/29 18:02:56 victor Exp $
  86  */
  87
  88 #include "opt_ipsec.h"
  89 #include "opt_inet6.h"
  90
  91 #include <sys/param.h>
  92 #include <sys/systm.h>
  93 #include <sys/malloc.h>
  94 #include <sys/mbuf.h>
  95 #include <sys/domain.h>
  96 #include <sys/protosw.h>
  97 #include <sys/socket.h>
  98 #include <sys/socketvar.h>
  99 #include <sys/proc.h>
 100 #include <sys/jail.h>
 101 #include <sys/kernel.h>
 102 #include <sys/sysctl.h>
 103 #include <sys/thread2.h>
 104
 105 #include <machine/limits.h>
 106
 107 #include <vm/vm_zone.h>
 108
 109 #include <net/if.h>
 110 #include <net/if_types.h>
 111 #include <net/route.h>
 112
 113 #include <netinet/in.h>
 114 #include <netinet/in_pcb.h>
 115 #include <netinet/in_var.h>
 116 #include <netinet/ip_var.h>
 117 #ifdef INET6
 118 #include <netinet/ip6.h>
 119 #include <netinet6/ip6_var.h>
 120 #endif /* INET6 */
 121
 122 #ifdef IPSEC
 123 #include <netinet6/ipsec.h>
 124 #include <netproto/key/key.h>
 125 #endif
 126
 127 #ifdef FAST_IPSEC
 128 #if defined(IPSEC) || defined(IPSEC_ESP)
 129 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
 130 #endif
 131
 132 #include <netproto/ipsec/ipsec.h>
 133 #include <netproto/ipsec/key.h>
 134 #define IPSEC
 135 #endif /* FAST_IPSEC */
 136
 137 struct in_addr zeroin_addr;
 138
 139 /*
 140  * These configure the range of local port addresses assigned to
 141  * "unspecified" outgoing connections/packets/whatever.
 142  */
 143 int ipport_lowfirstauto = IPPORT_RESERVED - 1;  /* 1023 */
 144 int ipport_lowlastauto = IPPORT_RESERVEDSTART;  /* 600 */
 145
 146 int ipport_firstauto = IPPORT_RESERVED;         /* 1024 */
 147 int ipport_lastauto = IPPORT_USERRESERVED;      /* 5000 */
 148
 149 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO;    /* 49152 */
 150 int ipport_hilastauto = IPPORT_HILASTAUTO;      /* 65535 */
 151
 152 static __inline void
 153 RANGECHK(int var, int min, int max)
 154 {
 155         if (var < min)
 156                 var = min;
 157         else if (var > max)
 158                 var = max;
 159 }
 160
 161 static int
 162 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
 163 {
 164         int error;
 165
 166         error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
 167         if (!error) {
 168                 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
 169                 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
 170
 171                 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
 172                 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
 173
 174                 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
 175                 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
 176         }
 177         return (error);
 178 }
 179
 180 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
 181
 182 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
 183            &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
 184 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
 185            &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
 186 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
 187            &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
 188 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
 189            &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
 190 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
 191            &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
 192 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
 193            &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
 194
 195 /*
 196  * in_pcb.c: manage the Protocol Control Blocks.
 197  *
 198  * NOTE: It is assumed that most of these functions will be called from
 199  * a critical section.  XXX - There are, unfortunately, a few exceptions
 200  * to this rule that should be fixed.
 201  *
 202  * NOTE: The caller should initialize the cpu field to the cpu running the
 203  * protocol stack associated with this inpcbinfo.
 204  */
 205
 206 void
 207 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
 208 {
 209         LIST_INIT(&pcbinfo->pcblisthead);
 210         pcbinfo->cpu = -1;
 211 }
 212
 213 /*
 214  * Allocate a PCB and associate it with the socket.
 215  */
 216 int
 217 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
 218 {
 219         struct inpcb *inp;
 220 #ifdef IPSEC
 221         int error;
 222 #endif
 223
 224         inp = zalloc(pcbinfo->ipi_zone);
 225         if (inp == NULL)
 226                 return (ENOBUFS);
 227         bzero(inp, sizeof *inp);
 228         inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
 229         inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo;
 230         inp->inp_socket = so;
 231 #ifdef IPSEC
 232         error = ipsec_init_policy(so, &inp->inp_sp);
 233         if (error != 0) {
 234                 zfree(pcbinfo->ipi_zone, inp);
 235                 return (error);
 236         }
 237 #endif
 238 #ifdef INET6
 239         if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only)
 240                 inp->inp_flags |= IN6P_IPV6_V6ONLY;
 241         if (ip6_auto_flowlabel)
 242                 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
 243 #endif
 244         so->so_pcb = inp;
 245         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
 246         pcbinfo->ipi_count++;
 247         return (0);
 248 }
 249
 250 int
 251 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 252 {
 253         struct socket *so = inp->inp_socket;
 254         struct proc *p = td->td_proc;
 255         unsigned short *lastport;
 256         struct sockaddr_in *sin;
 257         struct sockaddr_in jsin;
 258         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 259         struct ucred *cred = NULL;
 260         u_short lport = 0;
 261         int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
 262         int error;
 263
 264         KKASSERT(p);
 265
 266         if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
 267                 return (EADDRNOTAVAIL);
 268         if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
 269                 return (EINVAL);        /* already bound */
 270         if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
 271                 wild = 1;    /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
 272         if (p)
 273                 cred = p->p_ucred;
 274         if (nam != NULL) {
 275                 sin = (struct sockaddr_in *)nam;
 276                 if (nam->sa_len != sizeof *sin)
 277                         return (EINVAL);
 278 #ifdef notdef
 279                 /*
 280                  * We should check the family, but old programs
 281                  * incorrectly fail to initialize it.
 282                  */
 283                 if (sin->sin_family != AF_INET)
 284                         return (EAFNOSUPPORT);
 285 #endif
 286                 if (!prison_replace_wildcards(td, nam))
 287                                 return (EINVAL);
 288                 lport = sin->sin_port;
 289                 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 290                         /*
 291                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 292                          * allow complete duplication of binding if
 293                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 294                          * and a multicast address is bound on both
 295                          * new and duplicated sockets.
 296                          */
 297                         if (so->so_options & SO_REUSEADDR)
 298                                 reuseport = SO_REUSEADDR | SO_REUSEPORT;
 299                 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
 300                         sin->sin_port = 0;              /* yech... */
 301                         bzero(&sin->sin_zero, sizeof sin->sin_zero);
 302                         if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
 303                                 return (EADDRNOTAVAIL);
 304                 }
 305                 if (lport != 0) {
 306                         struct inpcb *t;
 307
 308                         /* GROSS */
 309                         if (ntohs(lport) < IPPORT_RESERVED &&
 310                             cred && suser_cred(cred, PRISON_ROOT))
 311                                 return (EACCES);
 312                         if (so->so_cred->cr_uid != 0 &&
 313                             !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 314                                 t = in_pcblookup_local(inp->inp_pcbinfo,
 315                                     sin->sin_addr, lport,
 316                                     INPLOOKUP_WILDCARD, cred);
 317                                 if (t &&
 318                                     (!in_nullhost(sin->sin_addr) ||
 319                                      !in_nullhost(t->inp_laddr) ||
 320                                      (t->inp_socket->so_options &
 321                                          SO_REUSEPORT) == 0) &&
 322                                     (so->so_cred->cr_uid !=
 323                                      t->inp_socket->so_cred->cr_uid)) {
 324 #ifdef INET6
 325                                         if (!in_nullhost(sin->sin_addr) ||
 326                                             !in_nullhost(t->inp_laddr) ||
 327                                             INP_SOCKAF(so) ==
 328                                             INP_SOCKAF(t->inp_socket))
 329 #endif
 330                                         return (EADDRINUSE);
 331                                 }
 332                         }
 333                         if (cred && !prison_replace_wildcards(td, nam))
 334                                 return (EADDRNOTAVAIL);
 335                         t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport,
 336                                                wild, cred);
 337                         if (t && !(reuseport & t->inp_socket->so_options)) {
 338 #ifdef INET6
 339                                 if (!in_nullhost(sin->sin_addr) ||
 340                                     !in_nullhost(t->inp_laddr) ||
 341                                     INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
 342 #endif
 343                                 return (EADDRINUSE);
 344                         }
 345                 }
 346                 inp->inp_laddr = sin->sin_addr;
 347         }
 348         if (lport == 0) {
 349                 ushort first, last;
 350                 int count;
 351
 352                 jsin.sin_family = AF_INET;
 353                 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 354                 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
 355                         inp->inp_laddr.s_addr = INADDR_ANY;
 356                         return (EINVAL);
 357                 }
 358                 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 359
 360                 inp->inp_flags |= INP_ANONPORT;
 361
 362                 if (inp->inp_flags & INP_HIGHPORT) {
 363                         first = ipport_hifirstauto;     /* sysctl */
 364                         last  = ipport_hilastauto;
 365                         lastport = &pcbinfo->lasthi;
 366                 } else if (inp->inp_flags & INP_LOWPORT) {
 367                         if (cred &&
 368                             (error = suser_cred(cred, PRISON_ROOT))) {
 369                                 inp->inp_laddr.s_addr = INADDR_ANY;
 370                                 return (error);
 371                         }
 372                         first = ipport_lowfirstauto;    /* 1023 */
 373                         last  = ipport_lowlastauto;     /* 600 */
 374                         lastport = &pcbinfo->lastlow;
 375                 } else {
 376                         first = ipport_firstauto;       /* sysctl */
 377                         last  = ipport_lastauto;
 378                         lastport = &pcbinfo->lastport;
 379                 }
 380                 /*
 381                  * Simple check to ensure all ports are not used up causing
 382                  * a deadlock here.
 383                  *
 384                  * We split the two cases (up and down) so that the direction
 385                  * is not being tested on each round of the loop.
 386                  */
 387                 if (first > last) {
 388                         /*
 389                          * counting down
 390                          */
 391                         count = first - last;
 392
 393                         do {
 394                                 if (count-- < 0) {      /* completely used? */
 395                                         inp->inp_laddr.s_addr = INADDR_ANY;
 396                                         return (EADDRNOTAVAIL);
 397                                 }
 398                                 --*lastport;
 399                                 if (*lastport > first || *lastport < last)
 400                                         *lastport = first;
 401                                 lport = htons(*lastport);
 402                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
 403                                  lport, wild, cred));
 404                 } else {
 405                         /*
 406                          * counting up
 407                          */
 408                         count = last - first;
 409
 410                         do {
 411                                 if (count-- < 0) {      /* completely used? */
 412                                         inp->inp_laddr.s_addr = INADDR_ANY;
 413                                         return (EADDRNOTAVAIL);
 414                                 }
 415                                 ++*lastport;
 416                                 if (*lastport < first || *lastport > last)
 417                                         *lastport = first;
 418                                 lport = htons(*lastport);
 419                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
 420                                  lport, wild, cred));
 421                 }
 422         }
 423         inp->inp_lport = lport;
 424
 425         jsin.sin_family = AF_INET;
 426         jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 427         if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) {
 428                 inp->inp_laddr.s_addr = INADDR_ANY;
 429                 inp->inp_lport = 0;
 430                 return (EINVAL);
 431         }
 432         inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 433
 434         if (in_pcbinsporthash(inp) != 0) {
 435                 inp->inp_laddr.s_addr = INADDR_ANY;
 436                 inp->inp_lport = 0;
 437                 return (EAGAIN);
 438         }
 439         return (0);
 440 }
 441
 442 /*
 443  *   Transform old in_pcbconnect() into an inner subroutine for new
 444  *   in_pcbconnect(): Do some validity-checking on the remote
 445  *   address (in mbuf 'nam') and then determine local host address
 446  *   (i.e., which interface) to use to access that remote host.
 447  *
 448  *   This preserves definition of in_pcbconnect(), while supporting a
 449  *   slightly different version for T/TCP.  (This is more than
 450  *   a bit of a kludge, but cleaning up the internal interfaces would
 451  *   have forced minor changes in every protocol).
 452  */
 453 int
 454 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
 455         struct sockaddr_in **plocal_sin, struct thread *td)
 456 {
 457         struct in_ifaddr *ia;
 458         struct ucred *cred = NULL;
 459         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 460         struct sockaddr_in jsin;
 461         int jailed = 0;
 462
 463         if (nam->sa_len != sizeof *sin)
 464                 return (EINVAL);
 465         if (sin->sin_family != AF_INET)
 466                 return (EAFNOSUPPORT);
 467         if (sin->sin_port == 0)
 468                 return (EADDRNOTAVAIL);
 469         if (td && td->td_proc && td->td_proc->p_ucred)
 470                 cred = td->td_proc->p_ucred;
 471         if (cred && cred->cr_prison)
 472                 jailed = 1;
 473         if (!TAILQ_EMPTY(&in_ifaddrhead)) {
 474                 ia = TAILQ_FIRST(&in_ifaddrhead);
 475                 /*
 476                  * If the destination address is INADDR_ANY,
 477                  * use the primary local address.
 478                  * If the supplied address is INADDR_BROADCAST,
 479                  * and the primary interface supports broadcast,
 480                  * choose the broadcast address for that interface.
 481                  */
 482                 if (sin->sin_addr.s_addr == INADDR_ANY)
 483                         sin->sin_addr = IA_SIN(ia)->sin_addr;
 484                 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
 485                     (ia->ia_ifp->if_flags & IFF_BROADCAST))
 486                         sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
 487         }
 488         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 489                 struct route *ro;
 490
 491                 ia = (struct in_ifaddr *)NULL;
 492                 /*
 493                  * If route is known or can be allocated now,
 494                  * our src addr is taken from the i/f, else punt.
 495                  * Note that we should check the address family of the cached
 496                  * destination, in case of sharing the cache with IPv6.
 497                  */
 498                 ro = &inp->inp_route;
 499                 if (ro->ro_rt &&
 500                     (!(ro->ro_rt->rt_flags & RTF_UP) ||
 501                      ro->ro_dst.sa_family != AF_INET ||
 502                      satosin(&ro->ro_dst)->sin_addr.s_addr !=
 503                                       sin->sin_addr.s_addr ||
 504                      inp->inp_socket->so_options & SO_DONTROUTE)) {
 505                         RTFREE(ro->ro_rt);
 506                         ro->ro_rt = (struct rtentry *)NULL;
 507                 }
 508                 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
 509                     (ro->ro_rt == (struct rtentry *)NULL ||
 510                     ro->ro_rt->rt_ifp == (struct ifnet *)NULL)) {
 511                         /* No route yet, so try to acquire one */
 512                         bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
 513                         ro->ro_dst.sa_family = AF_INET;
 514                         ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
 515                         ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
 516                                 sin->sin_addr;
 517                         rtalloc(ro);
 518                 }
 519                 /*
 520                  * If we found a route, use the address
 521                  * corresponding to the outgoing interface
 522                  * unless it is the loopback (in case a route
 523                  * to our address on another net goes to loopback).
 524                  */
 525                 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
 526                         if (jailed) {
 527                                 if (jailed_ip(cred->cr_prison,
 528                                     ro->ro_rt->rt_ifa->ifa_addr)) {
 529                                         ia = ifatoia(ro->ro_rt->rt_ifa);
 530                                 }
 531                         } else {
 532                                 ia = ifatoia(ro->ro_rt->rt_ifa);
 533                         }
 534                 }
 535                 if (ia == NULL) {
 536                         u_short fport = sin->sin_port;
 537
 538                         sin->sin_port = 0;
 539                         ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
 540                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 541                             sintosa(&ia->ia_addr)))
 542                                 ia = NULL;
 543                         if (ia == NULL)
 544                                 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
 545                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 546                             sintosa(&ia->ia_addr)))
 547                                 ia = NULL;
 548                         sin->sin_port = fport;
 549                         if (ia == NULL)
 550                                 ia = TAILQ_FIRST(&in_ifaddrhead);
 551                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 552                             sintosa(&ia->ia_addr)))
 553                                 ia = NULL;
 554
 555                         if (!jailed && ia == NULL)
 556                                 return (EADDRNOTAVAIL);
 557                 }
 558                 /*
 559                  * If the destination address is multicast and an outgoing
 560                  * interface has been set as a multicast option, use the
 561                  * address of that interface as our source address.
 562                  */
 563                 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
 564                     inp->inp_moptions != NULL) {
 565                         struct ip_moptions *imo;
 566                         struct ifnet *ifp;
 567
 568                         imo = inp->inp_moptions;
 569                         if (imo->imo_multicast_ifp != NULL) {
 570                                 ifp = imo->imo_multicast_ifp;
 571                                 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
 572                                         if (ia->ia_ifp == ifp)
 573                                                 break;
 574                                 if (ia == NULL)
 575                                         return (EADDRNOTAVAIL);
 576                         }
 577                 }
 578                 /*
 579                  * Don't do pcblookup call here; return interface in plocal_sin
 580                  * and exit to caller, that will do the lookup.
 581                  */
 582                 if (jailed) {
 583                         jsin.sin_family = AF_INET;
 584                         if (!prison_get_nonlocal(cred->cr_prison,
 585                             sintosa(&jsin)) &&
 586                             !prison_get_local(cred->cr_prison, sintosa(&jsin)))
 587                                         /* IPv6 only Jail */
 588                                         return (EADDRNOTAVAIL);
 589                         *plocal_sin = &jsin;
 590                 } else {
 591                         *plocal_sin = &ia->ia_addr;
 592                 }
 593         }
 594         return (0);
 595 }
 596
 597 /*
 598  * Outer subroutine:
 599  * Connect from a socket to a specified address.
 600  * Both address and port must be specified in argument sin.
 601  * If don't have a local address for this socket yet,
 602  * then pick one.
 603  */
 604 int
 605 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 606 {
 607         struct sockaddr_in *if_sin;
 608         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 609         int error;
 610
 611         /* Call inner routine to assign local interface address. */
 612         if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0)
 613                 return (error);
 614
 615         if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
 616             inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr,
 617             inp->inp_lport, FALSE, NULL) != NULL) {
 618                 return (EADDRINUSE);
 619         }
 620         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 621                 if (inp->inp_lport == 0) {
 622                         error = in_pcbbind(inp, (struct sockaddr *)NULL, td);
 623                         if (error)
 624                                 return (error);
 625                 }
 626                 inp->inp_laddr = if_sin->sin_addr;
 627         }
 628         inp->inp_faddr = sin->sin_addr;
 629         inp->inp_fport = sin->sin_port;
 630         in_pcbinsconnhash(inp);
 631         return (0);
 632 }
 633
 634 void
 635 in_pcbdisconnect(struct inpcb *inp)
 636 {
 637
 638         inp->inp_faddr.s_addr = INADDR_ANY;
 639         inp->inp_fport = 0;
 640         in_pcbremconnhash(inp);
 641         if (inp->inp_socket->so_state & SS_NOFDREF)
 642                 in_pcbdetach(inp);
 643 }
 644
 645 void
 646 in_pcbdetach(struct inpcb *inp)
 647 {
 648         struct socket *so = inp->inp_socket;
 649         struct inpcbinfo *ipi = inp->inp_pcbinfo;
 650
 651 #ifdef IPSEC
 652         ipsec4_delete_pcbpolicy(inp);
 653 #endif /*IPSEC*/
 654         inp->inp_gencnt = ++ipi->ipi_gencnt;
 655         in_pcbremlists(inp);
 656         so->so_pcb = 0;
 657         sofree(so);
 658         if (inp->inp_options)
 659                 m_free(inp->inp_options);
 660         if (inp->inp_route.ro_rt)
 661                 rtfree(inp->inp_route.ro_rt);
 662         ip_freemoptions(inp->inp_moptions);
 663         inp->inp_vflag = 0;
 664         zfree(ipi->ipi_zone, inp);
 665 }
 666
 667 /*
 668  * The calling convention of in_setsockaddr() and in_setpeeraddr() was
 669  * modified to match the pru_sockaddr() and pru_peeraddr() entry points
 670  * in struct pr_usrreqs, so that protocols can just reference then directly
 671  * without the need for a wrapper function.  The socket must have a valid
 672  * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
 673  * except through a kernel programming error, so it is acceptable to panic
 674  * (or in this case trap) if the PCB is invalid.  (Actually, we don't trap
 675  * because there actually /is/ a programming error somewhere... XXX)
 676  */
 677 int
 678 in_setsockaddr(struct socket *so, struct sockaddr **nam)
 679 {
 680         struct inpcb *inp;
 681         struct sockaddr_in *sin;
 682
 683         /*
 684          * Do the malloc first in case it blocks.
 685          */
 686         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 687                 M_WAITOK | M_ZERO);
 688         sin->sin_family = AF_INET;
 689         sin->sin_len = sizeof *sin;
 690
 691         crit_enter();
 692         inp = so->so_pcb;
 693         if (!inp) {
 694                 crit_exit();
 695                 kfree(sin, M_SONAME);
 696                 return (ECONNRESET);
 697         }
 698         sin->sin_port = inp->inp_lport;
 699         sin->sin_addr = inp->inp_laddr;
 700         crit_exit();
 701
 702         *nam = (struct sockaddr *)sin;
 703         return (0);
 704 }
 705
 706 int
 707 in_setpeeraddr(struct socket *so, struct sockaddr **nam)
 708 {
 709         struct inpcb *inp;
 710         struct sockaddr_in *sin;
 711
 712         /*
 713          * Do the malloc first in case it blocks.
 714          */
 715         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 716                 M_WAITOK | M_ZERO);
 717         sin->sin_family = AF_INET;
 718         sin->sin_len = sizeof *sin;
 719
 720         crit_enter();
 721         inp = so->so_pcb;
 722         if (!inp) {
 723                 crit_exit();
 724                 kfree(sin, M_SONAME);
 725                 return (ECONNRESET);
 726         }
 727         sin->sin_port = inp->inp_fport;
 728         sin->sin_addr = inp->inp_faddr;
 729         crit_exit();
 730
 731         *nam = (struct sockaddr *)sin;
 732         return (0);
 733 }
 734
 735 void
 736 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err,
 737                 void (*notify)(struct inpcb *, int))
 738 {
 739         struct inpcb *inp, *ninp;
 740
 741         /*
 742          * note: if INP_PLACEMARKER is set we must ignore the rest of
 743          * the structure and skip it.
 744          */
 745         crit_enter();
 746         LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) {
 747                 if (inp->inp_flags & INP_PLACEMARKER)
 748                         continue;
 749 #ifdef INET6
 750                 if (!(inp->inp_vflag & INP_IPV4))
 751                         continue;
 752 #endif
 753                 if (inp->inp_faddr.s_addr != faddr.s_addr ||
 754                     inp->inp_socket == NULL)
 755                         continue;
 756                 (*notify)(inp, err);            /* can remove inp from list! */
 757         }
 758         crit_exit();
 759 }
 760
 761 void
 762 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp)
 763 {
 764         struct inpcb *inp;
 765         struct ip_moptions *imo;
 766         int i, gap;
 767
 768         for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
 769                 if (inp->inp_flags & INP_PLACEMARKER)
 770                         continue;
 771                 imo = inp->inp_moptions;
 772                 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
 773                         /*
 774                          * Unselect the outgoing interface if it is being
 775                          * detached.
 776                          */
 777                         if (imo->imo_multicast_ifp == ifp)
 778                                 imo->imo_multicast_ifp = NULL;
 779
 780                         /*
 781                          * Drop multicast group membership if we joined
 782                          * through the interface being detached.
 783                          */
 784                         for (i = 0, gap = 0; i < imo->imo_num_memberships;
 785                             i++) {
 786                                 if (imo->imo_membership[i]->inm_ifp == ifp) {
 787                                         in_delmulti(imo->imo_membership[i]);
 788                                         gap++;
 789                                 } else if (gap != 0)
 790                                         imo->imo_membership[i - gap] =
 791                                             imo->imo_membership[i];
 792                         }
 793                         imo->imo_num_memberships -= gap;
 794                 }
 795         }
 796 }
 797
 798 /*
 799  * Check for alternatives when higher level complains
 800  * about service problems.  For now, invalidate cached
 801  * routing information.  If the route was created dynamically
 802  * (by a redirect), time to try a default gateway again.
 803  */
 804 void
 805 in_losing(struct inpcb *inp)
 806 {
 807         struct rtentry *rt;
 808         struct rt_addrinfo rtinfo;
 809
 810         if ((rt = inp->inp_route.ro_rt)) {
 811                 bzero(&rtinfo, sizeof(struct rt_addrinfo));
 812                 rtinfo.rti_info[RTAX_DST] = rt_key(rt);
 813                 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 814                 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt);
 815                 rtinfo.rti_flags = rt->rt_flags;
 816                 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0);
 817                 if (rt->rt_flags & RTF_DYNAMIC)
 818                         rtrequest1_global(RTM_DELETE, &rtinfo, NULL, NULL);
 819                 inp->inp_route.ro_rt = NULL;
 820                 rtfree(rt);
 821                 /*
 822                  * A new route can be allocated
 823                  * the next time output is attempted.
 824                  */
 825         }
 826 }
 827
 828 /*
 829  * After a routing change, flush old routing
 830  * and allocate a (hopefully) better one.
 831  */
 832 void
 833 in_rtchange(struct inpcb *inp, int err)
 834 {
 835         if (inp->inp_route.ro_rt) {
 836                 rtfree(inp->inp_route.ro_rt);
 837                 inp->inp_route.ro_rt = NULL;
 838                 /*
 839                  * A new route can be allocated the next time
 840                  * output is attempted.
 841                  */
 842         }
 843 }
 844
 845 /*
 846  * Lookup a PCB based on the local address and port.
 847  */
 848 struct inpcb *
 849 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
 850                    u_int lport_arg, int wild_okay, struct ucred *cred)
 851 {
 852         struct inpcb *inp;
 853         int matchwild = 3, wildcard;
 854         u_short lport = lport_arg;
 855
 856         struct inpcbporthead *porthash;
 857         struct inpcbport *phd;
 858         struct inpcb *match = NULL;
 859
 860         /*
 861          * Best fit PCB lookup.
 862          *
 863          * First see if this local port is in use by looking on the
 864          * port hash list.
 865          */
 866         porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
 867             pcbinfo->porthashmask)];
 868         LIST_FOREACH(phd, porthash, phd_hash) {
 869                 if (phd->phd_port == lport)
 870                         break;
 871         }
 872         if (phd != NULL) {
 873                 /*
 874                  * Port is in use by one or more PCBs. Look for best
 875                  * fit.
 876                  */
 877                 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 878                         wildcard = 0;
 879 #ifdef INET6
 880                         if ((inp->inp_vflag & INP_IPV4) == 0)
 881                                 continue;
 882 #endif
 883                         if (inp->inp_faddr.s_addr != INADDR_ANY)
 884                                 wildcard++;
 885                         if (inp->inp_laddr.s_addr != INADDR_ANY) {
 886                                 if (laddr.s_addr == INADDR_ANY)
 887                                         wildcard++;
 888                                 else if (inp->inp_laddr.s_addr != laddr.s_addr)
 889                                         continue;
 890                         } else {
 891                                 if (laddr.s_addr != INADDR_ANY)
 892                                         wildcard++;
 893                         }
 894                         if (wildcard && !wild_okay)
 895                                 continue;
 896                         if (wildcard < matchwild &&
 897                             (cred == NULL ||
 898                              cred->cr_prison ==
 899                                         inp->inp_socket->so_cred->cr_prison)) {
 900                                 match = inp;
 901                                 matchwild = wildcard;
 902                                 if (matchwild == 0) {
 903                                         break;
 904                                 }
 905                         }
 906                 }
 907         }
 908         return (match);
 909 }
 910
 911 /*
 912  * Lookup PCB in hash list.
 913  */
 914 struct inpcb *
 915 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport_arg,
 916                   struct in_addr laddr, u_int lport_arg, boolean_t wildcard,
 917                   struct ifnet *ifp)
 918 {
 919         struct inpcbhead *head;
 920         struct inpcb *inp, *jinp=NULL;
 921         u_short fport = fport_arg, lport = lport_arg;
 922
 923         /*
 924          * First look for an exact match.
 925          */
 926         head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
 927             laddr.s_addr, lport, pcbinfo->hashmask)];
 928         LIST_FOREACH(inp, head, inp_hash) {
 929 #ifdef INET6
 930                 if (!(inp->inp_vflag & INP_IPV4))
 931                         continue;
 932 #endif
 933                 if (in_hosteq(inp->inp_faddr, faddr) &&
 934                     in_hosteq(inp->inp_laddr, laddr) &&
 935                     inp->inp_fport == fport && inp->inp_lport == lport) {
 936                         /* found */
 937                         if (inp->inp_socket == NULL ||
 938                             inp->inp_socket->so_cred->cr_prison == NULL) {
 939                                 return (inp);
 940                         } else {
 941                                 if  (jinp == NULL)
 942                                         jinp = inp;
 943                         }
 944                 }
 945         }
 946         if (jinp != NULL)
 947                 return (jinp);
 948         if (wildcard) {
 949                 struct inpcb *local_wild = NULL;
 950                 struct inpcb *jinp_wild = NULL;
 951 #ifdef INET6
 952                 struct inpcb *local_wild_mapped = NULL;
 953 #endif
 954                 struct inpcontainer *ic;
 955                 struct inpcontainerhead *chead;
 956                 struct sockaddr_in jsin;
 957                 struct ucred *cred;
 958
 959                 /*
 960                  * Order of socket selection:
 961                  * 1. non-jailed, non-wild.
 962                  * 2. non-jailed, wild.
 963                  * 3. jailed, non-wild.
 964                  * 4. jailed, wild.
 965                  */
 966                 jsin.sin_family = AF_INET;
 967                 chead = &pcbinfo->wildcardhashbase[
 968                     INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
 969                 LIST_FOREACH(ic, chead, ic_list) {
 970                         inp = ic->ic_inp;
 971                         jsin.sin_addr.s_addr = laddr.s_addr;
 972 #ifdef INET6
 973                         if (!(inp->inp_vflag & INP_IPV4))
 974                                 continue;
 975 #endif
 976                         if (inp->inp_socket != NULL)
 977                                 cred = inp->inp_socket->so_cred;
 978                         else
 979                                 cred = NULL;
 980                         if (cred != NULL && jailed(cred)) {
 981                                 if (jinp != NULL)
 982                                         continue;
 983                                 else
 984                                         if (!jailed_ip(cred->cr_prison,
 985                                             (struct sockaddr *)&jsin))
 986                                                 continue;
 987                         }
 988                         if (inp->inp_lport == lport) {
 989                                 if (ifp && ifp->if_type == IFT_FAITH &&
 990                                     !(inp->inp_flags & INP_FAITH))
 991                                         continue;
 992                                 if (inp->inp_laddr.s_addr == laddr.s_addr) {
 993                                         if (cred != NULL && jailed(cred))
 994                                                 jinp = inp;
 995                                         else
 996                                                 return (inp);
 997                                 }
 998                                 if (inp->inp_laddr.s_addr == INADDR_ANY) {
 999 #ifdef INET6
1000                                         if (INP_CHECK_SOCKAF(inp->inp_socket,
1001                                                              AF_INET6))
1002                                                 local_wild_mapped = inp;
1003                                         else
1004 #endif
1005                                                 if (cred != NULL &&
1006                                                     jailed(cred))
1007                                                         jinp_wild = inp;
1008                                                 else
1009                                                         local_wild = inp;
1010                                 }
1011                         }
1012                 }
1013                 if (local_wild != NULL)
1014                         return (local_wild);
1015 #ifdef INET6
1016                 if (local_wild_mapped != NULL)
1017                         return (local_wild_mapped);
1018 #endif
1019                 if (jinp != NULL)
1020                         return (jinp);
1021                 return (jinp_wild);
1022         }
1023
1024         /*
1025          * Not found.
1026          */
1027         return (NULL);
1028 }
1029
1030 /*
1031  * Insert PCB into connection hash table.
1032  */
1033 void
1034 in_pcbinsconnhash(struct inpcb *inp)
1035 {
1036         struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
1037         struct inpcbhead *bucket;
1038         u_int32_t hashkey_faddr, hashkey_laddr;
1039
1040 #ifdef INET6
1041         if (inp->inp_vflag & INP_IPV6) {
1042                 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
1043                 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
1044         } else {
1045 #endif
1046                 hashkey_faddr = inp->inp_faddr.s_addr;
1047                 hashkey_laddr = inp->inp_laddr.s_addr;
1048 #ifdef INET6
1049         }
1050 #endif
1051
1052         KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list"));
1053         inp->inp_flags |= INP_CONNECTED;
1054
1055         /*
1056          * Insert into the connection hash table.
1057          */
1058         bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1059             inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1060         LIST_INSERT_HEAD(bucket, inp, inp_hash);
1061 }
1062
1063 /*
1064  * Remove PCB from connection hash table.
1065  */
1066 void
1067 in_pcbremconnhash(struct inpcb *inp)
1068 {
1069         KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1070         LIST_REMOVE(inp, inp_hash);
1071         inp->inp_flags &= ~INP_CONNECTED;
1072 }
1073
1074 /*
1075  * Insert PCB into port hash table.
1076  */
1077 int
1078 in_pcbinsporthash(struct inpcb *inp)
1079 {
1080         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1081         struct inpcbporthead *pcbporthash;
1082         struct inpcbport *phd;
1083
1084         /*
1085          * Insert into the port hash table.
1086          */
1087         pcbporthash = &pcbinfo->porthashbase[
1088             INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)];
1089
1090         /* Go through port list and look for a head for this lport. */
1091         LIST_FOREACH(phd, pcbporthash, phd_hash)
1092                 if (phd->phd_port == inp->inp_lport)
1093                         break;
1094
1095         /* If none exists, malloc one and tack it on. */
1096         if (phd == NULL) {
1097                 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport),
1098                     M_PCB, M_INTWAIT | M_NULLOK);
1099                 if (phd == NULL)
1100                         return (ENOBUFS); /* XXX */
1101                 phd->phd_port = inp->inp_lport;
1102                 LIST_INIT(&phd->phd_pcblist);
1103                 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1104         }
1105
1106         inp->inp_phd = phd;
1107         LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1108
1109         return (0);
1110 }
1111
1112 void
1113 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1114 {
1115         struct inpcontainer *ic;
1116         struct inpcontainerhead *bucket;
1117
1118         bucket = &pcbinfo->wildcardhashbase[
1119             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1120
1121         ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1122         ic->ic_inp = inp;
1123         LIST_INSERT_HEAD(bucket, ic, ic_list);
1124 }
1125
1126 /*
1127  * Insert PCB into wildcard hash table.
1128  */
1129 void
1130 in_pcbinswildcardhash(struct inpcb *inp)
1131 {
1132         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1133
1134         KKASSERT(pcbinfo != NULL);
1135
1136         in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1137         inp->inp_flags |= INP_WILDCARD;
1138 }
1139
1140 void
1141 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1142 {
1143         struct inpcontainer *ic;
1144         struct inpcontainerhead *head;
1145
1146         /* find bucket */
1147         head = &pcbinfo->wildcardhashbase[
1148             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1149
1150         LIST_FOREACH(ic, head, ic_list) {
1151                 if (ic->ic_inp == inp)
1152                         goto found;
1153         }
1154         return;                 /* not found! */
1155
1156 found:
1157         LIST_REMOVE(ic, ic_list);       /* remove container from bucket chain */
1158         kfree(ic, M_TEMP);              /* deallocate container */
1159 }
1160
1161 /*
1162  * Remove PCB from wildcard hash table.
1163  */
1164 void
1165 in_pcbremwildcardhash(struct inpcb *inp)
1166 {
1167         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1168
1169         KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1170         in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1171         inp->inp_flags &= ~INP_WILDCARD;
1172 }
1173
1174 /*
1175  * Remove PCB from various lists.
1176  */
1177 void
1178 in_pcbremlists(struct inpcb *inp)
1179 {
1180         if (inp->inp_lport) {
1181                 struct inpcbport *phd = inp->inp_phd;
1182
1183                 LIST_REMOVE(inp, inp_portlist);
1184                 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1185                         LIST_REMOVE(phd, phd_hash);
1186                         kfree(phd, M_PCB);
1187                 }
1188         }
1189         if (inp->inp_flags & INP_WILDCARD) {
1190                 in_pcbremwildcardhash(inp);
1191         } else if (inp->inp_flags & INP_CONNECTED) {
1192                 in_pcbremconnhash(inp);
1193         }
1194         LIST_REMOVE(inp, inp_list);
1195         inp->inp_pcbinfo->ipi_count--;
1196 }
1197
1198 int
1199 prison_xinpcb(struct thread *td, struct inpcb *inp)
1200 {
1201         struct ucred *cr;
1202
1203         if (td->td_proc == NULL)
1204                 return (0);
1205         cr = td->td_proc->p_ucred;
1206         if (cr->cr_prison == NULL)
1207                 return (0);
1208         if (inp->inp_socket && inp->inp_socket->so_cred &&
1209             inp->inp_socket->so_cred->cr_prison &&
1210             cr->cr_prison == inp->inp_socket->so_cred->cr_prison)
1211                 return (0);
1212         return (1);
1213 }
1214
1215 int
1216 in_pcblist_global(SYSCTL_HANDLER_ARGS)
1217 {
1218         struct inpcbinfo *pcbinfo = arg1;
1219         struct inpcb *inp, *marker;
1220         struct xinpcb xi;
1221         int error, i, n;
1222         inp_gen_t gencnt;
1223
1224         /*
1225          * The process of preparing the TCB list is too time-consuming and
1226          * resource-intensive to repeat twice on every request.
1227          */
1228         if (req->oldptr == NULL) {
1229                 n = pcbinfo->ipi_count;
1230                 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1231                 return 0;
1232         }
1233
1234         if (req->newptr != NULL)
1235                 return EPERM;
1236
1237         /*
1238          * OK, now we're committed to doing something.  Re-fetch ipi_count
1239          * after obtaining the generation count.
1240          */
1241         gencnt = pcbinfo->ipi_gencnt;
1242         n = pcbinfo->ipi_count;
1243
1244         marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO);
1245         marker->inp_flags |= INP_PLACEMARKER;
1246         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1247
1248         i = 0;
1249         error = 0;
1250
1251         while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) {
1252                 LIST_REMOVE(marker, inp_list);
1253                 LIST_INSERT_AFTER(inp, marker, inp_list);
1254
1255                 if (inp->inp_flags & INP_PLACEMARKER)
1256                         continue;
1257                 if (inp->inp_gencnt > gencnt)
1258                         continue;
1259                 if (prison_xinpcb(req->td, inp))
1260                         continue;
1261                 bzero(&xi, sizeof xi);
1262                 xi.xi_len = sizeof xi;
1263                 bcopy(inp, &xi.xi_inp, sizeof *inp);
1264                 if (inp->inp_socket)
1265                         sotoxsocket(inp->inp_socket, &xi.xi_socket);
1266                 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0)
1267                         break;
1268                 ++i;
1269         }
1270         LIST_REMOVE(marker, inp_list);
1271         if (error == 0 && i < n) {
1272                 bzero(&xi, sizeof xi);
1273                 xi.xi_len = sizeof xi;
1274                 while (i < n) {
1275                         error = SYSCTL_OUT(req, &xi, sizeof xi);
1276                         ++i;
1277                 }
1278         }
1279         kfree(marker, M_TEMP);
1280         return(error);
1281 }